Native leaders across the region are upset the federal government is planning to licence a generic form of Oxycontin.
The Nishnawbe-Aski Police Service and the Chief of Treaty Three have added their voices to those opposed the decision.
NAPS Deputy Chief Bob Herman says it affects their service by increasing enforcement.
He adds at the same time, the federal government has cut their funding, meaning it will be more
difficult to keep up with the dealers.
Grand Chief of Treaty Three Warren White says he's shocked by the federal government's decision and describes it as a step backwards.